GRID vs MDYG: Holdings Overlap
GRIDFirst Trust NASDAQ Clean Edge Smart Grid Infrastructure Index Fund
First Trust · 120 holdings · $12.2B · as of 2026-03-31
MDYGState Street® SPDR® S&P 400™ Mid Cap Growth ETF
State Street (SPDR) · 245 holdings · $2.9B · as of 2026-08-06
Holdings snapshots are 128 days apart (GRID: 2026-03-31, MDYG: 2026-08-06). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are GRID and MDYG?
First Trust NASDAQ Clean Edge Smart Grid Infrastructure Index Fund (GRID, by First Trust) holds 120 positions; State Street® SPDR® S&P 400™ Mid Cap Growth ETF (MDYG, by State Street (SPDR)) holds 245. They have 7 holdings in common, and by portfolio weight the two funds are 1.6% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 1.6%Sum of the smaller weight of each shared holding
- Shared Holdings
- 7GRID holds 120 · MDYG holds 245
- Weight in Shared Holdings
- GRID 2%·MDYG 4%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in GRID
113 of 120 positions (97.5% of the fund) are not held by MDYG. Showing the top 30 by weight.
Sector Breakdown
| Sector | GRID | MDYG |
|---|---|---|
| Industrials | 53.2% | 29.8% |
| Utilities | 20.3% | 2.0% |
| Information Technology | 10.7% | 20.2% |
| Health Care | 0.0% | 15.5% |
| Consumer Discretionary | 4.3% | 9.0% |
| Other Sectors | 0.0% | 23.3% |
| Unclassified | 11.2% | 0.0% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts. “Unclassified” is weight we could not classify (11% of GRID, 0% of MDYG).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| GRID | +2.2% | +22.4% | +31.6% | +23.6% | +15.0% | +18.9% | 0.77% |
| MDYG | +3.3% | +21.6% | +28.0% | +16.0% | +8.5% | +11.3% | 0.56% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in GRID vs MDYG →
Shared Holdings(7)
The top 7 shared positions account for 100% of the overlap, led by NVT, MTZ and AEIS.
 NVTNVent Electric PLC COM USD0.01 | 2.10% | 1.41% | 1.41% |
|---|---|---|---|
 MTZMastec, Inc. COM | 0.09% | 0.85% | 0.09% |
 AEISAdvanced Energy Industries, Inc. COM | 0.05% | 0.66% | 0.05% |
 LFUSLittelfuse Inc. COM | 0.04% | 0.26% | 0.04% |
 VMIValmont Industries, Inc. COM | 0.03% | 0.31% | 0.03% |
 ENSEnerSys COM | 0.03% | 0.37% | 0.03% |
 BDCBelden Inc. COM | 0.01% | 0.12% | 0.01% |
Frequently Asked Questions
How much do GRID and MDYG overlap?
GRID and MDYG overlap by 1.6% of portfolio weight. They share 7 holdings (GRID holds 120 positions and MDYG holds 245), based on each fund's latest SEC-reported holdings.
Is it redundant to own both GRID and MDYG?
The two portfolios are 1.6% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of GRID and MDYG?
The largest positions held by both funds are NVT, MTZ, AEIS, LFUS and VMI. Together the top 7 shared positions account for 100% of the total overlap.
What does GRID own that MDYG doesn't?
113 positions (97.5% of GRID) are unique to GRID, led by ETN, JCI and NG-. In the other direction, 238 positions (95.9% of MDYG) are unique to MDYG.